Magical Flips

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Chef found $N$ magical cards in his drawer. Each card has a number written on each of its faces. He places all the cards on the table in a front face-up manner. Chef denotes the numbers on the front face by $A_1, A_2,..., A_N$ and on the back face by $B_1, B_2,..., B_N$. Chef can choose some (possibly zero or all) cards and flip them, then he will calculate the [bitwise AND](https://en.wikipedia.

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solution.cppC++17

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